Leading Edge Vortex Flow Computations And Comparison With Dnw Hst Wind Tunnel Data

Leading Edge Vortex Flow Computations and Comparison with DNW-HST Wind Tunnel Data

Computational Fluid Dynamics Review 2010

This volume contains 25 review articles by experts which provide up-to-date information about the recent progress in computational fluid dynamics (CFD). Due to the multidisciplinary nature of CFD, it is difficult to keep up with all the important developments in related areas. CFD Review 2010 would therefore be useful to researchers by covering the state-of-the-art in this fast-developing field.

Leading Edge Vortex Flow Computations and Comparisons with DNW-HST Wind Tunnel Data

Computations are presented for the vortical flow around a sharp-edged cropped delta wing with 65 deg leading edge sweep using a computational method based on the Reynolds-averaged Navier-Stokes equations. It is demonstrated that turbulence modelling plays a crucial role in the ability to capture the vortical structures. Standard one- and two- equation turbulence models need corrections for vortical flows in order to avoid over-prediction of the levels of turbulent viscosity inside vortex cores. In this paper two types of modifications to the two-equation k-omega turbulence model are investigated to overcome this problem. One modification consists of limiting the production of turbulent kinetic energy in the k-equation, whereas the other modification is aimed at increasing the production of dissipation in the dissipation equation (omega equation); omega represents the dissipation of turbulent kinetic energy.